The investigator described the developmental profile of refraction change in a large cohort of Chinese CC patients. The decisive factors to the range of myopic shift in unilateral CC appeared to be different from that in bilateral CC, indicating dramatic differences in the etiopathogenesis and refractive prognosis between bilateral and unilateral CC. The refraction data from CC patients provided in the study are of clinical significance to the guidelines for CC treatment, especially for IOL calculation concerning the laterality of CC.